如何设置上传的文件名？

Question

使用＆＃39; multer＆＃39; ，我这样请求图像文件。

此文件存储在＆＃39;上传＆＃39;我设置的文件夹。 我的代码如下：

var multer  = require('multer')
var upload = multer({dest:'./uploads/'});
//var upload = multer({ storage: storage });
var app = express();
app.use(app.router);
app.post('/upload', upload.single('puzzle'), function (req, res, next) {
    console.log(req.file);
});

但我想将我的文件名设置为＆＃39; abc.png＆＃39;不是＆＃39; abc＆＃39;

我阅读了文档，我发现的是

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, '/uploads');
  },
  filename: function (req, file, cb) {
    cb(null, file.fieldname + '-' + Date.now());
  }
});

var upload = multer({ storage: storage });

所以修改后的代码如下：

var multer  = require('multer')
var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, '/uploads');
  },
  filename: function (req, file, cb) {
    cb(file.filename+'.png', file);
  }
});

var upload = multer({ storage: storage });
var app = express();
app.use(app.router);
app.post('/upload', upload.single('puzzle'), function (req, res, next) {
    console.log(req.file);
});

但在这种情况下，会发生错误并说出错误：ENOENT，open＆＃39; / uploads / puzzle-1449496743377＆＃39; ，不像上面的图片......

我怎么解决这个问题？

我确信很多像我这样的新手开发者会因为不友善的文档而遇到麻烦......

Answer 1

    var fs = require('fs');
var multer  = require('multer')
//var uploader = multer({dest:'./uploads/'});

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, './uploads/')
  },
  filename: function (req, file, cb) {
    crypto.pseudoRandomBytes(16, function (err, raw) {
      cb(null, raw.toString('hex') + Date.now() + '.png');
    });
  }
});
var upload = multer({ storage: storage });
var app = express();
app.use(app.router);
app.post('/upload', upload.single('puzzle'), function (req, res, next) {
    console.log(req.file);
});

解决了，谢谢大家，谢谢你

Answer 2

我认为您的问题在于目标目录的定义。起点＆＃39;。＆＃39;不见了。 尝试使用此代码：

destination: function (req, file, cb) {
  cb(null, './uploads/');
},